CRAZY PAIN PLEASE HELP!!!?

Okay so I was bringing a clip board up stairs and had it set under to my right ribcage then bumped into a wall! It hurt so bad caz i was running! 2 days later (feb 22) i still had not pooped and was still hurting the past 2 days (including today) it has gotten worse and still cant poop I looked it up where I smashed it and it is around my Ascending Colon! My mom wont take me to the DR and she says the only reason u haven't pooped it caz you have been drinking a lot of milk (I have drank about a gallon in the past 4 days my self) but I don't think that's the problem because when i have to poop I feel it but I just don't feel any poop!